The Second Treatise is one of the most important political treatises ever written and one of the most far-reaching in its influence. In his provocative 15-page introduction to this edition, the late eminent political theorist C. B. Macpherson examines Locke's arguments for limited, conditional government, private property, and right of revolution and suggests reasons for the appeal of these arguments in Locke's time and since. It is a book that the revolutionaries themselves were well acquainted with, and formed the rational basis for justifying both the Revolution and the establishment of the Constitution. Any student of American history, particularly of the revolution and the formation of the Constitution, out of necessity should read this book.

The Second Treatise outlines a theory of civil society. John Locke begins by describing the state of nature, a picture much more stable than Thomas Hobbes' state of "war of every man against every man," and argues that all men are created equal in the state of nature by God. From this, he goes on to explain the hypothetical rise of property and civilization, in the process explaining that the only legitimate governments are those that have the consent of the people. Therefore, any government that rules without the consent of the people can, in theory, be overthrown.

John Locke FRS was an English philosopher and physician regarded as one of the most influential of Enlightenment thinkers and known as the "Father of Classical Liberalism". Considered one of the first of the British empiricists, following the tradition of Sir Francis Bacon, he is equally important to social contract theory.